Tapered steam injection process

Wells – Processes – Distinct – separate injection and producing wells

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E21B 4324

Patent

active

044911807

ABSTRACT:
A method is disclosed for recovering hydrocarbons by a series of steps wherein about 0.1 to about 0.6 pore volumes of steam of a relatively high quality is initially injected into the formation. Thereafter, an additional 0.1 to about 0.6 pore volumes of steam is injected wherein the quality of the steam is gradually decreased to a relatively low quality. The injection sequence is concluded with about 0.5 to about 2.0 pore volumes of water, preferably at an ambient temperature.

REFERENCES:
patent: 3353598 (1967-11-01), Smith
patent: 3360045 (1967-12-01), Santourian
patent: 3483924 (1969-12-01), Blevins et al.
patent: 3572437 (1971-03-01), Marberry et al.
patent: 4060129 (1977-11-01), Gomaa et al.
patent: 4093027 (1978-06-01), Gomaa

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